Principles of Electrical Measurements |
From inside the book
Results 1-3 of 34
Page 224
... ratio bridge : ( i ) Greater sensitivity since the whole of the applied voltage appears across Zs and Z. ( ii ) If the point a is earthed , stray capacitances from points b and c to earth are ... Ratio Error Mutual Admittance Bridges.
... ratio bridge : ( i ) Greater sensitivity since the whole of the applied voltage appears across Zs and Z. ( ii ) If the point a is earthed , stray capacitances from points b and c to earth are ... Ratio Error Mutual Admittance Bridges.
Page 499
... error limits . Class TABLE XII Limits of Errors for Current Transformers Percentage of Rated Current 120-60 60-20 20-10 Ratio Phase Ratio Phase Ratio Phase Error Diff . Error Diff . Error Diff . A 0.5 % 35 min 0.5 % B I'O 60 ΙΟ 35 min ...
... error limits . Class TABLE XII Limits of Errors for Current Transformers Percentage of Rated Current 120-60 60-20 20-10 Ratio Phase Ratio Phase Ratio Phase Error Diff . Error Diff . Error Diff . A 0.5 % 35 min 0.5 % B I'O 60 ΙΟ 35 min ...
Page 500
Harold Buckingham, Ernest Maurice Price. TESTING OF INSTRUMENT TRANSFORMERS 11.16 . Tests for Ratio Error and Phase Difference . 11.16.1 . Indirect Tests : Instead of measuring the actual errors the principle of the indirect method is to ...
Harold Buckingham, Ernest Maurice Price. TESTING OF INSTRUMENT TRANSFORMERS 11.16 . Tests for Ratio Error and Phase Difference . 11.16.1 . Indirect Tests : Instead of measuring the actual errors the principle of the indirect method is to ...
Other editions - View all
Common terms and phrases
accuracy adjustment alternating amount anode applied arms arrangement balance beam bridge calibrated capacitance carrying causes characteristics circuit coil compared compensation component connected constant construction convenient core damping deflection depends determined difference direct disc earth effect electrical electrode elements employed equal equation error example factor field fixed flux force frequency galvanometer give given grid Hence impedance increase indication inductance instrument known leads less limited load magnetic material means measured meter method movement moving mutual necessary negative obtained ohms operating oscillator phase plates position possible potential potentiometer power-factor practice primary principle proportional range ratio reading reduced represents resistance resonance scale screen secondary sensitivity shown in Fig shunt standard suitable supply switch takes temperature torque transformer turns units usually valve variable variation voltage voltmeter winding zero